Antioxidants(ALA, NAC, multi vits, CoQ10, berries), self hypnosis/deep relaxation, better diet, and garlic(also an antioxidant).
Ive been able to keep my blood pressure down at 110/55 with a Resting Heart beat of 45-50 bpm just doing the first three. If you can take garlic aka garlique, thats pretty good stuff as far as Ive read.